Plantronics just introduced a Bluetooth headset designed primarily for outdoor use. Built to withstand the elements, the Explorer 370 is military certified under MIL Spec 810 to be water, dust, and shock resistant, plus there's a filter to block wind noise. There are two versions of the Explorer 370: the Explorer 370 Rugged, and the Explorer 370 Sport. The Rugged has a beefier look, with extra padding on the sides, while the Sport looks a little smoother. Both will be available in March, and will cost $79.95 per unit.